Mortar mixer



Oct. 31, 1950 J, POLAK 2,527,761

MORTAR MIXER Filed July 2, 1948 v 3 Sheets-Shee't I IN VEN TOR.

JOSEPH G. POLAK Fig. 6'

ATTORNEYS Oct. 31, 1950 J. a. POLAK 2,527,761

MORTAR MIXER Filed July 2, 1948 3 Sheets-Sheet 2 g5 IQ 5'1 25 o IQ [Q] 5'2 Z7 6 63 2:0 0 Z O 43 lg 6 0 64 a a] El 71 65 4 Oct. 31, 1950 J. G. POLAK 2,527,761

J'OJEPH G. POLAK T TOR/YEKS Patented Oct. 31, 1950 UNITED STATES ATENT OFFICE 7 MoR'rAR MIXER Joseph ,G. "Polak, Bethlehem, Pa. Application July 2, 1948, Serial No. 36,780 a This invention relates'to mortar mixing machines, and more particularly to a mortar mixing machine of the type wherein the ingredients of the mortar are mixed by rotating blades in a cylindrical drum.

A main object of the invention is to provide a noveland improved mortar mixer which is simple in construction, easy to operate, and which includes safety means for automatically terminating the operation of the mixing blades whenever any one of the mortar mixing compartments is opened, whereby operating hazards are greatly reduced.

A further object of the invention is to provide an improved mortarmixing machine which may be mounted on a truck or other vehicle for convenient transportation, said machine having multiple mortar mixing compartments, and having automatic control means for terminating the op eration thereof when any of said compartments is opened, the machine being compact in size, rugged in construction, easy to load and dependable in performance.

'Further'objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is an elevational 'view of the discharge side of a mortar mixing machine constructed in accordance with the present invention.

Figure 2 is a right end elevational view partly broken away, of the mortar mixing machine of Figure 1.

Figure 3 is a transverse fragmentary cross-sectional view of the machine taken on line 3-3 of Figured.

Figure 4 is a front elevational view, partly in cross-section'of the mortar mixing machine of Figure l. i w

Figure 5 is a left end elevational'vi'ew of the machine of Figure 1 with the discharge hopper removed.

Figure 6 is a cross-sectional detail view taken on line 66 of Figure 4.

Referring to the drawings, II designates the main body of the machine'Qwhich comprises ,a housing having a central transverse partition l2 which divides the housing into two mortar mixing compartments. Body II is secured to a rectangular base frame 13 formed of angle bars or the like, which may be securedon a truck or on any other suitable support, such as shown at M.

3 Claims. (01. 259-178) coupled by a belt 43 to'a suitable able upwardly from their Jclosedpositions to provide access to saidcompartments for loading :the compartments with the 'mortar ingredients. Mounted on the upper portion of body .I I by means of brackets 6?, Ll is a water tank l8. Extending from water tank l8 into the respective mixing compartments are water feed conduits l9=and provided with the respective control valves 2| and 22. Water is furnished to .tank l8 by means of a supply conduit 23. Supply conduit 23 is providedwith a control valve .24, a first faucet connection 25 and a second faucetconnectionifi, of conventional construction. A hose 21 may be employed to connect either faucet 25 or 2.6 to a suitable water supply main.

Axially journalled in the end walls vofhousing iand inpartition i2 is ashaft 28. Sccuredto shaft 28 in each mixing compartment are, the,agi-. tator assemblies 29, each agitatorassemblyhaving aplurality of radialmixing blades .3fi;.:.One end of shaft 28 projectsinto a gear housing 3.1 and secured to said shaft end within'the gearhousing is a worm gear 32. Designated at 33 is'a worm shaft journalled in housing at andcarrying a worm 34 which meshes with worm gear 32. Shaft 33 1S rotatively supported at its intermediate portion in a bearing 35 and carries a toothedclutch plate 36 outwardly adjacent said bearing. Rotatably and slidably mounted on shaftqssadjacent clutch plate 35 is a sleeve member '37 formed at one .end with clutch teeth interengageable with clutch plate 35. Sleeve member 3] is annularly grooved adjacent its other end, as shown at .318, and said grooved portion is rotatably received in the fork. 3% of a clutch shifting lever iii? pivoted to the end wall of body 'ii at M. A spring 42 connects the lower portion of lever 4G tothe portionoftsaid'end Wall to the left thereof, as viewed in Figured, biasing lever iiiclockwise, and normally urging sleeve 3? into inter-engagement with clutch plate 36. When lever as is rotated counterclockwise, sleeve member Slis disengaged from clutch plate 36.

Sleeve member 31 carries a pulley 42 which is power source, as for example,.an electric motor.

Hinged to the lower "front margin of body H is a treadle bar M, said bar fill being rigidlyjse cured to the hinge shaft 35 by brackets 45, and the ends of the shaft passing rotatably through bearing lugs 37,- secured to the end wallsof body H. The lower end of lever 38 is connectedby a link rod 18 to an arm 69 secured to -onejof the projecting end portions of shaft Also' se cured to said projecting shaft end portion is an upstanding hand lever 50 whose upper portion passes through a U-shaped bracket 5| secured to the housing end wall. When either treadle bar 44 or hand lever 50 is rotated clockwise, as viewed in Figure 2, link rod 48 rotates lever counterclockwise to disconnect clutch sleeve 3'! from clutch plate 36, causing termination of rotation of agitator shaft 28. Bracket 5! may be provided with suitable locking means for securing lever 50 in a clockwise rotated position, for example, apertures 52 adapted to receive retaining pins to hold lever 50 against counterclockwise rotation.

Designated at 53 is a plate member rigidly secured to a shaft 54 rotatably mounted on housing ll rearwardly adjacent to and parallel with the hinge axes of the closures l5 and I6. Plate member 53 overlaps the inner rear corner portions of both closures l5 and [6, as shown in Figure 4. Secured to the end of shaft 54 is an arm 55. Arm 55 is connected by a link rod 56 to the end of an arm 51 rigidly secured to the projecting right end of shaft 45, as viewed in Figure 4. Therefore, when either of the closures 15 or IE is rotated upwardly to an open position, plate member 53 is rotated clockwise, as viewed in Figure 5, causing arm 55 and link 56 to rotate arm 51 and shaft 45 counterclockwise. The counterclockwise rotation of shaft 45 causes the clutch sleeve 31 to disengage from clutch plate 36 and terminate operation of the agitator shaft 28.

J ournalled to the rear wall of body I l, as shown in Figure l, is a horizontal sleeve member 53, to the end of which is secured an upstanding hand lever 59. Secured to sleeve member 58 are outwardly projecting arms 60, 60. Designated at BI is a vertically slidable gate member carried at the lower left portion of body ll and connected to arms 60, by link rods 62, 82. Gate member Bl normally closes off a discharge opening for the left mixing compartment, as viewed in Figure 1. When lever 59 is rotated counterclockwise, as viewed in Figure 5, arms 50, 60 and sleeve member 58 are rotated counterclockwise, whereby link rods 62, 62 move the gate member 6| upwardly to open position.

Extending rotatably through sleeve member 58 to the right side of body I I, as viewed in Figure 1, is a shaft 63 provided with outwardly extending arms 64, 64. Arms 64, B4 are connected by link rods 65, 65 to a vertically slidable gate member 65 carried at the lower right portion of body H and normally closing off a discharge opening for the right mixing compartment, as viewed in Figure 1. Secured to the end of shaft 63 adjacent lever 59 is an upwardly extending hand lever 67.

When hand lever 61 is rotated counterclockwise, as shown in Figure 5, gate member 66 is opened. Rotation of hand levers 59 and 61 is limited by a strap member 68 extending around said hand levers and secured at its ends to the body ll.

Secured to base frame l3 sub-adjacent the discharge gates GI and 66 by brackets 69, 69 is a discharge hopper 10, the outer portion of said hopper being supported by chains H, II connecting the outer corner portions of the hopper to the body I I. Hopper 10 has a central partition 12 dividing it into two compartments, and the lower portion of the front wall of the hopper is provided with vertically slidable gate members 13, i3 normally closing off openings communicating with the respective hopper compartments. Pivoted to said hopper front wall are hand levers I4, 14 connected by link rods I5, 15 to the respective gate members l3, [3, whereby said gate members may be opened by moving the handle portions of levers I4, 14 downwardly.

By opening gate members 6| and 56, as above described, the mixed mortar may be discharged into the respective hopper compartments, and the respective mixtures may then be discharged from said compartments by opening gate members l3, 13.

When the mortar ingredients are to be furnished to the mixer compartments the opening of the closures 15 or IE automatically terminates the rotation of the agitator shaft 28 in the event that the operator has failed to terminate said rotation either by stepping on the treadle bar 44 or by pulling lever 50.

This substantially decreases the danger of injury to the operator from the agitator blades 30.

As soon as the operator closes the covers l5 and I5 and releases the lever 50 and the treadle bar 44 the clutch sleeve 31 -interengages with clutch plate 36 and rotation of agitator shaft 28 is resumed.

The provision of two compartments in housing ll enables two different mortar mixtures to be simultaneously prepared by the machine.

While a specific embodiment of a mortar mixing machine has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. In a mortar mixing machine having a housing, a top closure for said housing, an agitator shaft journaled in said housing and means for driving said agitator shaft, said means including a clutch, a treadle bar hinged on said housing, links operatively connecting said treadle bar to said ciutch for movement of the clutch to disengaging position responsive to depression of said treadle bar, and links operatively connected between said cover and said treadle bar for depressing said treadle bar upon movement of the cover to open position thereby disengaging said clutch.

2. In a mortar mixing machine having a housing, a closure for said housing, an agitator shaft journaled in said housing, and means for driving said agitator shaft, said means including a clutch, a treadle bar hinged on said housing, means operatively connecting said treadle bar to said clutch for movement of the clutch to disengaging position responsive to depression of said treadle bar, and means operatively connected between said cover and said treadle bar for depressing said treadle bar upon movement of the cover to open position thereby disengaging said clutch. 3. A mortar mixing machine comprising a housing divided into adjacent mixing compartments, an agitator in each of said compartments, a hinged closure member for each of said compartments, means for actuating said agitators including a clutch operablefor disengaging said agitators from said actuating means, a treadle bar pivoted on said housing, means connecting said closure members with said clutch for disengaging said clutch from'said actuating means upon opening of each of said closure members, and means connecting said treadle bar with said connecting means between said closure members and said clutch.

JOSEPH G. POLAK.

(References on following page) 5 REFERENCES CITED Number The following references are of record in the file of thls patent: 1,192,327 UNITED STATES PATENTS 5 1 99 230 Number Name Date 3 3 2 560,259 Day et a1. May 19, 1896 1,382,123

6 Name Date Jordan Nov. 20, 1900 Boughton Feb. 23, 1904 Larsen July 25, 1916 Eberling Jan. 15, 1929 Krupp Jan. 19, 1932 Defibaugh Oct. 11, 1932 

